VictoriaMetrics/app/vminsert/opentsdbhttp/request_handler.go

74 lines
2.2 KiB
Go

package opentsdbhttp
import (
"fmt"
"net/http"
"github.com/VictoriaMetrics/VictoriaMetrics/app/vminsert/netstorage"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
parser "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/opentsdbhttp"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/tenantmetrics"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/writeconcurrencylimiter"
"github.com/VictoriaMetrics/metrics"
)
var (
rowsInserted = tenantmetrics.NewCounterMap(`vm_rows_inserted_total{type="opentsdb-http"}`)
rowsPerInsert = metrics.NewHistogram(`vm_rows_per_insert{type="opentsdbhttp"}`)
)
// InsertHandler processes HTTP OpenTSDB put requests.
// See http://opentsdb.net/docs/build/html/api_http/put.html
func InsertHandler(req *http.Request) error {
path := req.URL.Path
p, err := httpserver.ParsePath(path)
if err != nil {
return fmt.Errorf("cannot parse path %q: %w", path, err)
}
if p.Prefix != "insert" {
// This is not our link.
return fmt.Errorf("unexpected path requested on HTTP OpenTSDB server: %q", path)
}
at, err := auth.NewToken(p.AuthToken)
if err != nil {
return fmt.Errorf("auth error: %w", err)
}
switch p.Suffix {
case "api/put", "opentsdb/api/put":
return writeconcurrencylimiter.Do(func() error {
return parser.ParseStream(req, func(rows []parser.Row) error {
return insertRows(at, rows)
})
})
default:
return fmt.Errorf("unexpected path requested on HTTP OpenTSDB server: %q", path)
}
}
func insertRows(at *auth.Token, rows []parser.Row) error {
ctx := netstorage.GetInsertCtx()
defer netstorage.PutInsertCtx(ctx)
ctx.Reset() // This line is required for initializing ctx internals.
for i := range rows {
r := &rows[i]
ctx.Labels = ctx.Labels[:0]
ctx.AddLabel("", r.Metric)
for j := range r.Tags {
tag := &r.Tags[j]
ctx.AddLabel(tag.Key, tag.Value)
}
ctx.ApplyRelabeling()
if len(ctx.Labels) == 0 {
// Skip metric without labels.
continue
}
if err := ctx.WriteDataPoint(at, ctx.Labels, r.Timestamp, r.Value); err != nil {
return err
}
}
rowsInserted.Get(at).Add(len(rows))
rowsPerInsert.Update(float64(len(rows)))
return ctx.FlushBufs()
}